History of the Peloponnesian War

About the same time they sent to the river Strymon ten thousand colonists, consisting of Athenians and their allies, with a view to colonising the place, then called Nine Ways, but now Amphipolis; and though these colonists gained possession of Nine Ways, which was inhabited by Edoni, yet when they advanced into the interior of Thrace they were destroyed at Drabescus in Edonia by the united forces of the Thracians, to whom the settlement of the place was a menace.

As for the Thasians, who had been defeated in battle and were now besieged, they appealed to the Lacedaemonians and urged them to come to their aid by invading Attica.